Ability to temporarily activate an action / ability to physically hold a toolbar button

[ChiraChan]

In Photoshop, you have the ability to temporarily press down a keyboard button, in order to only temporarily switch to that tool. Once you let go, the tool switches back to your previous one. I would love to have this feature in Tablet Friend.

For example, I have Tablet Friend toolbar buttons for the eyedropper tool and the brush tool. Every time I want to switch to the eyedropper, I have to tap on its button, then tap on the point of my canvas I want to pick color from, then tap on the brush button, then move back to the canvas where I want to keep drawing with my new color. That's a lot of taps for an action I often need to do very rapidly when drawing.

One solution would be to be able to physically hold the eyedropper button with a finger, while being able to draw with the pen at the same time. Then once you let go, it switches back to your previous tool/button.

Another solution would be to have a "temporary action" - you press the eyedropper button and it select the eyedropper, but after your next click, it switches back to the previously used button.

Both solutions may be nice to have and could offer unique use cases.